Android Toast三种使用方法

例题2-15

activiy_main.xml代码

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout android:layout_width="fill_parent"
 3     android:layout_height="fill_parent"
 4     android:orientation="vertical"
 5     xmlns:android="http://schemas.android.com/apk/res/android">
 6     <Button
 7         android:id="@+id/btn1"
 8         android:layout_width="200dip"
 9         android:layout_height="wrap_content"
10         android:layout_gravity="center"
11         android:text="默认方式"/>
12     <Button
13         android:id="@+id/btn2"
14         android:layout_width="200dip"
15         android:layout_height="wrap_content"
16         android:layout_gravity="center"
17         android:text="自定义方式"/>
18     <Button
19         android:id="@+id/btn3"
20         android:layout_width="200dp"
21         android:layout_height="wrap_content"
22         android:layout_gravity="center"
23         android:text="图片方式"/>
24 </LinearLayout>

Mainactivity.java代码

 1 package com.example.hellos;
 2 
 3 import androidx.appcompat.app.AppCompatActivity;
 4 
 5 import android.os.Bundle;
 6 import android.view.Gravity;
 7 import android.view.View;
 8 import android.widget.Button;
 9 import android.widget.GridLayout;
10 import android.widget.ImageView;
11 import android.widget.LinearLayout;
12 import android.widget.Toast;
13 
14 public class MainActivity extends AppCompatActivity {
15     Button b1,b2,b3;
16     Toast toast;
17     LinearLayout toastView;
18     ImageView imageView;
19     @Override
20     protected void onCreate(Bundle savedInstanceState) {
21         super.onCreate(savedInstanceState);
22         setContentView(R.layout.activity_main);
23         b1=(Button)findViewById(R.id.btn1);
24         b2=(Button)findViewById(R.id.btn2);
25         b3=(Button)findViewById(R.id.btn3);
26         b1.setOnClickListener(new myClick());
27         b2.setOnClickListener(new myClick());
28         b3.setOnClickListener(new myClick());
29 
30     }
31 
32     private class myClick implements View.OnClickListener {
33 
34         @Override
35         public void onClick(View v) {
36             if(v==b1){
37                 Toast.makeText(MainActivity.this,"Toast",Toast.LENGTH_SHORT).show();
38             }else if(v==b2){
39                 toast=Toast.makeText(MainActivity.this,"toast",Toast.LENGTH_SHORT);
40                 toast.setGravity(Gravity.CENTER,0,0);
41                 toast.show();
42             }else{
43                 toast=Toast.makeText(MainActivity.this,"toast",Toast.LENGTH_SHORT);
44                 toast.setGravity(Gravity.CENTER,0,80);
45                 toastView=(LinearLayout)toast.getView();
46                 imageView=new ImageView(MainActivity.this);
47                 imageView.setImageResource(R.drawable.p1);
48                 toastView.addView(imageView,0);
49                 toast.show();
50             }
51         }
52     }
53 }

 

posted @ 2020-09-25 21:21  冯寳寳  阅读(1011)  评论(0)  编辑  收藏  举报